Outer rotor type motor

Abstract

Provided is an outer rotor type motor capable of reducing workload for wiring and connecting coil leads without reducing a coil space factor while keeping the motor small. Coil leads extracted from same-phase coils of respective stator units pass between pole teeth of the stator units, and are respectively connected to inter-phase connection terminals at one end and then connected in series with each other, the stator units comprises a plurality of individual same-phase stator units which are stacked together, and the inter-phase connection terminals are protruded from a main terminal body. A drive signal input terminal and external input terminals, to which the other ends of coil leads extracted from the respective phase coils are respectively connected, and a drive signal input terminal and an external input terminal, to which the other ends of coil leads extracted from the respective phase coils are respectively connected, are respectively connected and wired inside the main terminal body.

What is claimed is: 
     
       1. An outer rotor type motor, comprising: a stator including a plurality of stator units, which are concentrically stacked around a bearing section, each of the stator units having a pair of stator yokes, each of which has comb-shaped pole teeth, and an air-core coil, which is formed by winding a magnet wire and sandwiched between the stator yokes; a rotor shaft being inserted in the bearing section; a rotor including a permanent magnet, which has magnetic poles facing the pole teeth, and a rotor yoke, which is capable of rotating about the rotor shaft; and a drive circuit terminal block, in which a drive signal input terminal of a drive circuit for energizing the coils to drive the motor, inter-phase connection terminals and external input terminals are integrally formed in a main terminal body,
 wherein coil leads extracted from the same-phase coils of the respective stator units pass between the pole teeth of the stator units, and are respectively connected to inter-phase connection terminals at one end and then connected in series with each other, the stator units includes a plurality of the individual same-phase stator units which are stacked together, the inter-phase connection terminals are protruded from the main terminal body, the drive signal input terminal and the external input terminals, to which the other ends of the coil leads extracted from the respective phase coils are respectively connected, and a drive signal input terminal and an external input terminal, to which the other ends of the coil leads extracted from the respective phase coils are respectively connected, are respectively connected and wired inside the main terminal body. 
 
     
     
       2. The outer rotor type motor according to  claim 1 , wherein a lead frame, in which the inter-phase connection terminals, the drive signal input terminal and the external input terminals are connected by a connecting section, is insert-molded in the drive circuit terminal block, and then the connecting section is cut, thereby the terminals protruded from the main terminal body are formed. 
     
     
       3. The outer rotor type motor according to  claim 1 , wherein the main terminal body is composed of heat releasing resin.